Nuprl Lemma : bst_null_wf
∀[E:Type]. (bst_null() ∈ bs_tree(E))
Proof
Definitions occuring in Statement :
bst_null: bst_null(),
bs_tree: bs_tree(E),
uall: ∀[x:A]. B[x],
member: t ∈ T,
universe: Type
Definitions unfolded in proof :
uall: ∀[x:A]. B[x],
member: t ∈ T,
bs_tree: bs_tree(E),
bst_null: bst_null(),
eq_atom: x =a y,
ifthenelse: if b then t else f fi ,
btrue: tt,
subtype_rel: A ⊆r B,
ext-eq: A ≡ B,
and: P ∧ Q,
bs_treeco_size: bs_treeco_size(p),
bs_tree_size: bs_tree_size(p),
has-value: (a)↓,
nat: ℕ,
le: A ≤ B,
less_than': less_than'(a;b),
false: False,
not: ¬A,
implies: P ⇒ Q,
prop: ℙ,
all: ∀x:A. B[x],
so_lambda: λ2x.t[x],
so_apply: x[s],
uimplies: b supposing a
Lemmas referenced :
bs_treeco-ext,
it_wf,
ifthenelse_wf,
eq_atom_wf,
unit_wf2,
bs_treeco_wf,
false_wf,
le_wf,
nat_wf,
has-value_wf_base,
set_subtype_base,
int_subtype_base,
is-exception_wf,
equal_wf,
has-value_wf-partial,
set-value-type,
int-value-type,
bs_treeco_size_wf
Rules used in proof :
sqequalSubstitution,
sqequalTransitivity,
computationStep,
sqequalReflexivity,
isect_memberFormation,
cut,
dependent_set_memberEquality,
introduction,
extract_by_obid,
hypothesis,
sqequalHypSubstitution,
isectElimination,
thin,
hypothesisEquality,
sqequalRule,
dependent_pairEquality,
tokenEquality,
instantiate,
universeEquality,
productEquality,
voidEquality,
applyEquality,
productElimination,
natural_numberEquality,
independent_pairFormation,
lambdaFormation,
divergentSqle,
sqleReflexivity,
intEquality,
lambdaEquality,
independent_isectElimination,
because_Cache,
equalityTransitivity,
equalitySymmetry,
dependent_functionElimination,
independent_functionElimination,
cumulativity
Latex:
\mforall{}[E:Type]. (bst\_null() \mmember{} bs\_tree(E))
Date html generated:
2017_10_01-AM-08_30_47
Last ObjectModification:
2017_07_26-PM-04_24_44
Theory : tree_1
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